Side Extension approval rate in Hounslow
Hounslow approved 88.1% of side extension applications, based on 7,853 decisions analysed.
Last updated: August 2026
88.1%
side extension approval rate
7,853
Side Extension decisions
6,917
Approved
936
Refused
87.9%
Hounslow overall
Side Extension applications are approved at roughly the same rate as the Hounslow average (87.9%).
How side extension compares in Hounslow
Side Extension
88.1%
Hounslow all applications
87.9%
Planning a side extension in Hounslow?
88.1% get approved, but the odds vary by street. Your Full Planning Analysis shows exactly what gets approved and refused near your property.
✓ Your ward's side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Hounslow →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Hounslow
85.0%
89.7%
88.9%
90.3%
80.9%
85.5%
92.9%
94.7%
88.9%
90.0%
89.9%
73.0%
82.9%
48.7%
69.4%